These recommendations are applicable in south Florida (South of Orlando), where a distinctive, non-migratory population of monarchs has long been established.
However, native milkweed planting is still encouraged in this area.
We tried to clarify in the factsheet that we do not recommend cutting back milkweed south of Orlando in south Florida.
It was put in after my conversation with you. I think this was an important point.
I'm so glad you clued me in to that.
Because the south Florida monarchs appear to be a distinct, non-migratory population that has been established for some time and depends on tropical milkweed, we are not recommending cutting it back there.
We are encouraging gardeners farther north, especially along the Gulf coast and in Texas, to cut their tropical milkweed, however. We are finding such high rates of the protozoan parasite OE in these monarchs that breed year-round along the Gulf coast, that we are concerned and want to discourage year-round breeding in those areas. The people involved in this discussion included Lincoln Brower, Chip Taylor, Karen Oberhauser, Wendy Caldwell, Sonia Altizer, and me.